condition mean min max ZT0-3 1830.587839 1830.587839 1830.587839 ZT4-7 1114.669792 1114.669792 1114.669792 ZT8-11 1444.8857475 1444.8857475 1444.8857475 ZT12-15 1480.8250245 1480.8250245 1480.8250245 ZT16-19 3038.4629045 3038.4629045 3038.4629045 ZT20-23 3536.8658175 3536.8658175 3536.8658175